Course materials developed at the Geometry Center and used for teaching pre- and in-service teachers of high school geometry interested in using technology in their classrooms (see the Summer 1996 syllabus ). Four self-contained parts: Internet Skills, Classical Geometry, Dynamical Systems, and Symmetries and Patterns, include: an Introduction to the World Wide Web and Technical Information; Introductory Questions for Geometer's Sketchpad, Monge's Theorem, and Peaucellier's Linkage; a Dynamical Systems lab; Introduction to Symmetries, Wallpaper Patterns, Orbifolds, and Unfolding an Orbifold; and Appendices with links to/lists of videos shown in the source, software, and a short bibliography.